A-3125199R2-AI Air FilterOne New Aftermarket Replacement Outer Air Filter Fits Case International Harvester, Fits Kubota, Fits John Deere, Fits Bobcat, and More This outer (primary) engine air filter protects the air intake system from dust, dirt, and debris, preventing premature engine wear and maintaining performance across a wide range of agricultural, construction, and industrial equipment. It installs in a two stage air cleaner assembly alongside an inner safety filter.